5
81907004M
1 FUNCTION AND USAGE
CA 462 is a combined standalone leakage detection and temperature blocking relay for DIN rail mount.
1.1 Function leakage
In case of water leakage, the resistance between the sensor electrode and housing will decrease. If the resist-
ance becomes less than 100 kohm (±10 %) between terminals 11 and 12, the relay contact on terminal 1 and 2
closes. The signal has to be stable for at least 10 seconds before the relay is been activated.
1.2 Function temperature blocking
If the temperature in the pump is rising and the terminal protector sets o, the CA 462 is blocking the pump
without any delay.
Automatic reset
− if terminal 14 and 15 are open; pump starts automatically when the temperature is back to normal.
Manual reset
− if terminal 14 and 15 are bridged; manual reset has to be done by terminal 13 and 14 after the temperature
is back to normal.
Table 1: Connection chart
Terminal Description
1Leakage alarm relay (NO)
2Leakage alarm relay
3High temperature alarm relay (NO)
4High temperature alarm relay
5Pump relay (NO) (Closed under normal operation)
6Pump relay
7 Power supply (0 V or N)
8 Power supply (+24 VDC or L1)
9 Input from pump temperature sensor (PTC / Klixon)
10 Input from pump temperature sensor (PTC / Klixon)
11 Input from pump leakage probes
12 Connect to ground or pump chassis
13 Reset switch for high temperature alarm
14 Reset switch for high temperature alarm
15 Manual reset required if bridged to terminal 14*
* If bridged to terminal 14; manually reset is required after high temperature alarm after condi-
tion is back to normal. If not bridge; pump start automatically when condition is back to normal.
Table 2: Product reference
Article Description
16907006 CA 462 110-230 VAC supply voltage
16907007 CA 462 18-36 VDC supply voltage
One item of Xylem MiniCas adapter is included in both 16907006 and 16907007.
EN
